function z = renwu1(x)
	z=-(6.452*(x(1)+0.125*x(2))*(cos(x(1))-cos(x(2)))*(cos(x(1))-cos(x(2))))/sqrt(0.8+(x(1)-4.2)*(x(1)-4.2)+2*(x(2)-7)*(x(2)-7))+3.226*x(2);
end